However, because oral medications must pass through the digestive system, to have the same efficacy as IV medications oral antibiotics must have high âbioavailabilityâ â the percentage of the drug that reaches the blood. Drugs administered via PICC lines have, by definition, 100 percent bioavailability.
A: Bactrim is a type of antibiotic used to treat a range of bacterial infections in the body according to WebMD. Physicians prescribe Bactrim to treat certain types of sexually transmitted diseases, urinary tract infections, respiratory illnesses, and various other infections.
Bactrim works against bacteria in the following types of infections: 1  Urinary tract infections (UTIs) caused by E. coli, Klebsiella, Enterobacter, Morganella morganii, Proteus mirabilis, and Proteus vulgaris.actrim is the brand name of the generic antibiotic sulfamethoxazole trimethoprim (sometimes called co-trimoxazole). The drug is a combination of two antibiotics: It's one part trimethoprim (a synthetic drug), and five parts sulfamethoxazole (a sulfonamide drug).